18494859 has 16 divisors (see below), whose sum is σ = 25369344. Its totient is φ = 11978400.

The previous prime is 18494851. The next prime is 18494867. The reversal of 18494859 is 95849481.

It is an interprime number because it is at equal distance from previous prime (18494851) and next prime (18494867).

It is not a de Polignac number, because 18494859 - 2³ = 18494851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18494851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39889 + ... + 40349.

It is an arithmetic number, because the mean of its divisors is an integer number (1585584).

Almost surely, 2^18494859 is an apocalyptic number.

18494859 is a deficient number, since it is larger than the sum of its proper divisors (6874485).

18494859 is a wasteful number, since it uses less digits than its factorization.

18494859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818.

The product of its digits is 414720, while the sum is 48.

The square root of 18494859 is about 4300.5649628857. The cubic root of 18494859 is about 264.4541225433.

The spelling of 18494859 in words is "eighteen million, four hundred ninety-four thousand, eight hundred fifty-nine".